<!DOCTYPE html>
<html>
<body style="color: black; background: white;">
  <div style="opacity: 0">Test 1</div>
  <div style="opacity: 0">Test 2</div>
  <div style="opacity: 0">Test 3</div>
  <div style="opacity: 0">Test 4</div>
  <div style="opacity: 1">Test 5</div>
  <div style="opacity: 1">Test 6</div>
  <div style="opacity: 1">Test 7</div>
  <div style="opacity: 1">Test 8</div>

  <div style="opacity: 0">Test 9</div>
  <div style="opacity: 0">Test 10</div>
  <div style="opacity: 0">Test 11</div>
  <div style="opacity: 0">Test 12</div>

  <div style="opacity: 1">Test 13</div>
  <div style="opacity: 1">Test 14</div>
  <div style="opacity: 1">Test 15</div>
  <div style="opacity: 1">Test 16</div>
</body>
</html>
